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Hospital / health system · Sofia · Bulgaria

University Hospital St. Ivan Rilski

In research, University Hospital St. Ivan Rilski stands highest in Medicine (#8,986 of 10,443 worldwide) and Health Sciences (#10,761 of 11,982 worldwide), 2022–2025.

rilski.comROR OpenAlex
World rank, 2022–2025
#22,805
of 28,054 · #27,012 all time
Rank in Bulgaria
#70
of 92
Research works
545
▲ 118% vs 2013–17
Citations
5.1k
9.3 per fractional work
Top-10% rate
4.3%
record average 16.5%
Open access
61%
world 28%

What is University Hospital St. Ivan Rilski known for in research?

The fields where it stands highest, 2022–2025, ranked among every institution above the floor in each field.

FieldWorld rankWhere that sitsTop-10% rateWorksAll time
MedicineField #8,986 of 10,443 4.4%138 #11832
Health SciencesDomain #10,761 of 11,982 4.4%142 #14896

Each strip is that field’s whole ranked pool, with the notch where University Hospital St. Ivan Rilski sits in it, in the colour of the band that rank falls in. The track under the rate is the rate itself: it carries no world mark, because the world rate differs by field (from about 6% to 21% in this record).

Field profile

Location quotient across every field it publishes in: outside the ring is more than an institution of this size would be expected to publish, inside it is less.

Agricultural and Biological Sciences: 0.04× its world share, 0 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 1.38× its world share, 13 worksBiochemistry, Geneti…Immunology and Microbiology: 3.53× its world share, 6 worksImmunology and Micro…Neuroscience: 1.33× its world share, 4 worksNeurosciencePharmacology, Toxicology and Pharmaceutics: 0.80× its world share, 0 worksPharmacology, Toxico…Chemistry: 0.16× its world share, 0 worksChemistryComputer Science: 0.13× its world share, 2 worksComputer ScienceEarth and Planetary Sciences: 0.36× its world share, 1 worksEarth and Planetary …Engineering: 0.09× its world share, 2 worksEngineeringEnvironmental Science: 0.16× its world share, 1 worksEnvironmental ScienceMaterials Science: 0.02× its world share, 0 worksMaterials SciencePhysics and Astronomy: 0.08× its world share, 0 worksPhysics and AstronomyDentistry: 0.06× its world share, 0 worksDentistryHealth Professions: 0.63× its world share, 3 worksHealth ProfessionsMedicine: 4.06× its world share, 138 worksMedicineNursing: 1.09× its world share, 1 worksNursingVeterinary: 0.69× its world share, 0 worksVeterinaryArts and Humanities: 0.08× its world share, 0 worksArts and HumanitiesBusiness, Management and Accounting: 0.01× its world share, 0 worksBusiness, Management…Economics, Econometrics and Finance: 0.22× its world share, 1 worksEconomics, Econometr…Psychology: 0.14× its world share, 1 worksPsychologySocial Sciences: 0.05× its world share, 1 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Medicine, 4.1×. Every wedge is a field page.

Who are the top researchers at University Hospital St. Ivan Rilski?

Ranked on the composite score, Alexander Sirakov, Stanimir Sirakov and Румен Стоилов lead among researchers whose main affiliation is University Hospital St. Ivan Rilski.

  1. 1 Alexander Sirakov Bulgaria · #852,790 worldwide 9 citations · 18 works
  2. 2 Stanimir Sirakov Bulgaria · #1,075,448 worldwide 9 citations · 16 works
  3. 3 Румен Стоилов Bulgaria · #1,428,060 worldwide 6 citations · 16 works
  4. 4 Zahariy Krastev Bulgaria · #1,549,976 worldwide 8 citations · 15 works
All ranked researchers at University Hospital St. Ivan Rilski

Which keywords describe research at University Hospital St. Ivan Rilski?

By fractional works in 2022–2025, weighted toward what it does more of than the world: Epidemiology, Treatment, Genetic Mutations, Autoantibodies, Endovascular Treatment, Inflammation, Diagnosis and Radiosurgery.

▲ more of its work than of the world’s◆ about the world’s share▼ less than the world’s

Size is fractional works in 2022–2025 in the topics tagged with each word; colour is the word's share of this institution's work against its share of the world's. The 40 words are chosen for being large and distinctive. Each links to the topic it comes from most.

All 40 words, with their numbers
  1. Epidemiology22▲ 3.2×68 topics
  2. Treatment13▲ 6.0×27 topics
  3. Inflammation11▲ 3.1×33 topics
  4. Genetic Mutations9▲ 12×16 topics
  5. Autoantibodies8▲ 20×8 topics
  6. Diagnosis8▲ 4.9×24 topics
  7. Endovascular Treatment8▲ 79×2 topics
  8. Genetics6▲ 4.5×9 topics
  9. Neurological Disorders6▲ 5.6×12 topics
  10. Radiosurgery6▲ 34×4 topics
  11. Surgical Management5▲ 7.3×13 topics
  12. Hemodynamics5▲ 55×2 topics
  13. Aneurysmal Subarachnoid Hemorrhage5▲ 80×1 topic
  14. Intracranial Aneurysms5▲ 80×1 topic
  15. Clinical Practice Guidelines5▲ 5.0×12 topics
  16. Chemotherapy5▲ 3.8×12 topics
  17. Clinical Management5▲ 15×5 topics
  18. Magnetic Resonance Imaging4▲ 9.8×7 topics
  19. Epilepsy4▲ 23×3 topics
  20. Fibrosis4▲ 13×7 topics
  21. Diagnostic Criteria4▲ 11×8 topics
  22. Neurobiology4▲ 9.3×2 topics
  23. Prognostic Factors4▲ 5.4×10 topics
  24. Pathogenesis4▲ 4.4×13 topics
  25. Seizures4▲ 37×2 topics
  26. Drug Resistance4▲ 7.8×6 topics
  27. Surgery4▲ 6.0×5 topics
  28. Embolization4▲ 30×2 topics
  29. Antiepileptic Drugs3▲ 25×2 topics
  30. Cerebrovascular Events3▲ 36×2 topics
  31. Pathophysiology3▲ 6.4×7 topics
  32. Stroke Prevention3▲ 16×2 topics
  33. Endothelial Dysfunction3▲ 8.1×5 topics
  34. Carotid Artery Stenosis3▲ 36×1 topic
  35. Cytokines3▲ 6.3×5 topics
  36. Endarterectomy3▲ 36×1 topic
  37. Arteriovenous Malformations3▲ 78×1 topic
  38. Cerebral Cavernous Malformations3▲ 78×1 topic
  39. Immunosuppressive Therapy3▲ 8.9×6 topics
  40. Status Epilepticus3▲ 35×1 topic

Which research topics does University Hospital St. Ivan Rilski publish most on?

By volume in 2022–2025: Intracranial Aneurysms: Treatment and Complications, Cerebrovascular and Carotid Artery Diseases, Vascular Malformations Diagnosis and Treatment and Epilepsy research and treatment.

Intracranial Aneurysms: Treatment and Complications: 5 fractional worksCerebrovascular and Carotid Artery Diseases: 3 fractional worksVascular Malformations D…3Vascular Malformations Diagnosis and Treatment: 3 fractional worksEpilepsy research and tr…3Epilepsy research and treatment: 3 fractional worksSystemic Lupus Erythematosus Research: 2 fractional worksSystemic Sclerosis and Related Diseases: 2 fractional worksRheumatoid Arthritis Res…2Rheumatoid Arthritis Research and Therapies: 2 fractional worksEsophageal and GI Pathology: 2 fractional worksMoyamoya disease diagnosis and treatment: 2 fractional worksGlioma Diagnosis and Treatment: 2 fractional works
NeurologyPulmonary and Respiratory MedicinePsychiatry and Mental healthRheumatology3 others

Area is fractional works; colour is the subfield each topic belongs to.

  1. 1 Intracranial Aneurysms: Treatment and Complications Neurology 5 works
  2. 2 Cerebrovascular and Carotid Artery Diseases Pulmonary and Respiratory Medicine 3 works
  3. 3 Vascular Malformations Diagnosis and Treatment Neurology 3 works
  4. 4 Epilepsy research and treatment Psychiatry and Mental health 3 works
  5. 5 Systemic Lupus Erythematosus Research Rheumatology 2 works
  6. 6 Systemic Sclerosis and Related Diseases Pathology and Forensic Medicine 2 works
  7. 7 Rheumatoid Arthritis Research and Therapies Rheumatology 2 works
  8. 8 Esophageal and GI Pathology Surgery 2 works
  9. 9 Moyamoya disease diagnosis and treatment Rheumatology 2 works
  10. 10 Glioma Diagnosis and Treatment Genetics 2 works

How open and international is its research?

Against the world’s own shares — the tick on each track. Both are shares of its output, so they sit on one scale and can be read against each other as well as against the world.

openly available61.0%not open39.0%

World: 28% of research is openly available.

with international co-authors17.3%domestic only82.7%

World: 19% is written across borders.

How has University Hospital St. Ivan Rilski's research output changed?

Output in 2018–2022 was 118% higher than in 2013–2017.

199520002005201020152020
grewheldshrank

The same series as a ribbon — one cell per year, darker for more. The line above answers how much; this answers when.

Other research institutions in Sofia

All research institutions in Sofia

Research measures only: rankings here say nothing about teaching, admissions or student experience. Comparable institutions and collaboration partners are in the interactive view on the map.